{ identifier: 'name',
  label: 'name',
  items: [
     { name:'John', type:'parent',
         children:[{_reference:'Chuck'}, {_reference:'Melissa'}, {_reference:'Nancy'}, {_reference:'Peter'}] },
     { name:'Mary', type:'parent', checked: true,
         children:[{_reference:'Chuck'}, {_reference:'Melissa'}, {_reference:'Nancy'}, {_reference:'Joan'}] },
     { name:'Chuck', type:'child', checked: true },
     { name:'Melissa', type:'child', checked: false },
     { name:'Nancy', type:'child', checked: true },
     { name:'Peter', type:'parent', checked: false,
         children:[{_reference:'Chantal'}, {_reference:'Pascal'}, {_reference:'Rutger'}, {_reference:'Charlotte'}] },
     { name:'Joan', type:'parent', checked: true,
         children:[{_reference:'Chantal'}, {_reference:'Pascal'}, {_reference:'Rutger'}, {_reference:'Charlotte'}] },
     { name:'Chantal', type:'child', checked: false,
         children:[{_reference:'Paul'}, {_reference:'Donna'}, {_reference:'Eric'}] },
     { name:'Rutger', type:'child', checked: false },
     { name:'Pascal', type:'child', checked: true },
     { name:'Charlotte', type:'child', checked: false },
     { name:'Paul', type:'child', checked: true },
     { name:'Donna', type:'child', checked: false },
     { name:'Eric', type:'child', checked: true }
]}

